Dundalk's hopes of a League and Cup double remain firmly alive as Stephen Kenny's men booked a place in the quarter-finals of the FAI Cup with a thrilling 5-3 win over Limerick in a goal feast at Oriel Park.
Limerick were still trying to find their feet when Dundalk grabbed their opener after just seven minutes.
Skipper Stephen O'Donnell sent Lims goalkeeper Barry Ryan the wrong way from the penalty spot after Pat Hoban had been hauled down by Robbie Williams.
Stuart Taylor's side levelled 10 minutes later when Dave O'Leary's in-swinging free was met by the head of Axel Bossekota who headed home despite the best efforts of Peter Cherrie.
Dundalk restored their lead with a sublime goal in the 24th minute. Richie Towell motored forward to collect a wonderful Byrne lay-off and he showed magnificent technique to smash the ball past Ryan with the outside of his right foot.
And the home side took a two goal lead into the break when Byrne curled a cracking 25-yard free-kick into Ryan's bottom corner.
Darren Meenan made it 4-2 when he turned the ball home from close range after Ryan could only parry a powerful Towell free-kick just short of the hour mark.
Limerick pulled one back in the 63rd minute when Rory Gaffney swept the ball past Cherrie before Byrne restored Dundalk's two goal advantage with a tap in shortly after.
Gaffney grabbed a second for the Blues in the 75th minute before the striker saw red three minutes later for a second yellow card.
Dundalk FC: Cherrie; Sullivan, Boyle, Rossiter, Massey (Dillon 79); Towell, Shields, O'Donnell (Faherty 86); Meenan (Mulvenna 83), Hoban, Byrne.
Limerick FC: Ryan; Kelly, Folan, Williams, Costelloe (Murphy 57); Galbraith, O'Leary, Rainsford, Gamble, Bossekota (Sheedy 62); Gaffney.
Referee: Anthony Buttimer.